Learn Ruby the Hard Way: A Simple and Idiomatic Introduction to the Imaginative World of Computational Thinking with Code, Third Edition

Exercise 22. What Do You Know So Far?

There won’t be any code in this exercise or the next one, so there’s no What You Should See or Study Drills either. In fact, this exercise is like one giant Study Drill. I’m going to have you do a review of what you have learned so far.

First, go back through every exercise you have done so far and write down every word and symbol (another name for “character”) that you have used. Make sure your list of symbols is complete.

Next to each word or symbol, write its name and what it does. If you can’t find a name for a symbol in this book, then look for it online. If you do not know what a word or symbol does, then read about it again and try using it in some code.

You may run into a few things you can’t find ...